Fuel Gauge, Checking (Adaptation)

If the fuel gauge displays the contents of the fuel tanks as being too high or too low, the fuel gauge needle position can be corrected (adapted). Perform the following procedures.

1. Perform Output Diagnostic Test Mode (DTM) for the instrument cluster. See OUTPUT DIAGNOSTIC TEST MODE (DTM) (FUNCTION 03)  .
2. If Output Diagnostic Test Mode (DTM) does not recognize a malfunction, check function of sender for fuel gauge. Check resistance value of sender for fuel gauge in read measuring value block, display group 002. See READ MEASURING VALUE BLOCK (FUNCTION 08)  .
   NOTE: For open circuit or short circuit in sender for fuel gauge, the contents of the fuel tank are indicated as "0 liters". If this is the case, continue troubleshooting according to the wiring diagram and replace the sender for fuel gauge if necessary.
3. Compare the values indicated in the measuring value block for resistance of the sender and the contents of the fuel tank with the specified values from the FUEL SENDER RESISTANCE VALUES  table.
4. If the fuel gauge needle does not represent the relevant specified value for the contents of the fuel tank, the fuel gauge must be adapted. See Fuel Gauge Adaptation  .